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i E. T. STARR. Apparatus 4for Prutecting and Moistening the'Dsks fDental-Engines. No'.l5'9,048.

Patented 1an. 26, 1875.

v IN VEJVTOR @L im By Attorney @MLM N v,UNITED STATES PATENT GFFICE@'ELI 'n s'rAnn, or PHILADELPHIA, PENNSYLVANIA, AssiGNon To SAMUEL s.WHITE, on SAME PLACE.

IMPROVEMENT lh! APPARATUS FORAPROTECTING AND MOISTENING THE DISKS OFDENTAL. l ENGINES.

Specification forming part of Letters Patent N0. 159,048, dated January1875; application filed January 8, 1875.

,Y being had toa/,the accompanying drawings,

which make part of this specification, and in which- Figure l representsa view, part-ly in sec-S tion, of a hand-piece of a dental engine withmy improved apparatus applied thereto; Fig. .2, a view innperspective ofa disk, its shield or protector, and sponge-holder.l Fig. 3 represents aview, partly in section, of another form of the apparatus. s', i Thedrawings are all on an enlarged scale. In performing dentaloperationswith .rotary disks it is desirable that the disk should beprotected, in order to prevent injury to the patient or operator fromaccidental contact therewith. It is also desirable to keep the diskmoistcned, and to prevent the moistening uid from being thrown upon thepatient by the centrifugal force' generated by the rotation of the disk.P.

It is the object of ,my invention to attain these desideratum's, towhich ends my improvements consist, first, in a shield or diskiprotector, adapted to be applied to the hand- -piecepof a'dental engine,and so constructed as partially to inclose the disk 5 secondly, incombining with a disk-protector a device for ,supplying moisture to thedisk.

My invention further .consists in' mounting the disk-protector upon atubular shank having elastic walls, wherebyit mayreadily be` removedfrom or replaced upon the handpiece of the engine, and the shank of thedisk may be inserted through'it intothe socket of the tool-holder.

The hand-piece'A, of the usual construe CASE C.

tion,-has a chuck 0ry tool-holder, B, turning' in suitable: bearingstherein, and providedv i with a socket, in which the shank c ofthe diskC is inserted, and' secured-in any of the well-known ways.

A shield or disk-potecton-D, is mountedupon a tubular socket,'D/slottedlong'rtudinally at its back end,/sol as to constitute a a springto clamp the socket upon the handy piece when slipped over it, as shownin Fig-.1. The shield or protector inv this instance 1s 'shown as madein the form of a half of a disk,`

provided with rimsl or flanges d, which over- `lapthe edges of the disk,but so as toleave the' sidev next to the tooth uninclosied. 'Obviously,however, the form of lthis shield or` protector may be varied Withoutaltering its function. l Y

The shield and its flanges d are cut away at one point for the insertionof the device for moistening the disk.

In Figs. 1 and 2 this device is shown as consisting of a sponge held,iujplace by a springholder, E, mounted upon the socket orhandle of theshieldl or protector.

In Fig. 3 the moistening device is shown as consisting'of afsmallbulbsyrin ge, F, mounted on a collar, f, capable of turning freelyaround the socket D.' The nozzle of this syringe comes opposite the slotinthe shield, and the inoistening uid is ejected at will bythe operatorcompressing the syringe with his iingers.

I prefer device, asit places the supply of fluid directly under thecontrol of the operator.

The disk isapplied to the -hand'piece by first inserting the hand-pieceinthe tubular `shank or 'handle of the disk-protector, and theninserting the shank of the disk into its socket through thedisk-protector, the latter being perforated for that purpose.

; I claim 1. A shield or disk-protector,constructed substantially ashereinbefore set forth, and

thisllattervform ofthe moistening aaaptedto be applied to the hand-pieceof a. l shank passing through the 'sooketof the diskdental engine.protector.' and into the tool-heide 2. The combination, snbstantialy ashere- Y Intestiimony whereof have hereunto subinbefore set forth, of a.disk-protector and a ys ribed my name.

i loistening'device for dental engines.

3. The combination, substantialiy as here EM T. STARR. inbefore setforth, of' a, disk-protector, its Witnesses: tubular socket, a.hand-piece, a. chuck or tool- GRAS. W. DODGE,.

holder, and a rotating disk mounted on a. J'. A. B. WILLIAMS.

